This Alquati style sport exhaust appears to be best suited for adapting a wideband o2 sensor but it can come in a size of 50mm or 70mm. Do any of you know why one size would be better than the other? I am thinking the larger size will be less restricting than the smaller one.
Thanks for the help,
Rev.
(http://www.classicautorescue.com/12851b.jpg)